Good afternoon Gentlemen,

I recently bought a S14 SR20DE for my 1200 coupe and I am having a lot of drama finding a wiring diagram for the engine loom. I can find plenty of turbo diagrams and KA diagrams but no luck with ones for DE.

Thanks in advance for any help!

N-VCT is simple. The ECU sends a signal to it to retard the intake cam at a certain RPM. You can replace that with a toggle switch on the dash. There's only one wire on the VCT, and it's normally connected to a certain ECU pin

S14 with VCT only came in Japan (S14 black top)? If so you won't find English wiring diagrams

Some forums say:

S14 ECU PINOUT
* 113 - Yellow wire: VTC Solenoid Valve

Sorry for the confusion. I actually need the pin out for the whole ecu. Mainly where the powers and earths to the ECU go. I put VCT in the subject as there might be a difference between VCT and non VCT. Thanks for the help tho!

ECU pinout for JDM S14 Silvia SR20DE (all came with VCT)

Which ECU do you have?
* 23710-65F00 SR20DE.MT 2371M-65F00
* 23710-65F10 SR20DE.AT -9606 2371M-65F10
* 23710-80F70 SR20DE.AT 9606- 2371M-80F7


Found some more information on the VCT. All JDM S14 came with it

23796-65F00 VALVE ASSY-VALVE TIMING CONTROL 9606- 23796-65F01 23796-1N515
23796-65F10 VALVE ASSY-VALVE TIMING CONTROL -9606 23796-6P000/23796-6P001/23796-6P002/23796-6P00A
* S14 JDM SR20DE
* S14 JDM SR20DET
* S14 EUR SR20DET

Attach file:

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  23796-6P00A-.jpg (156.59 KB)


  23796-6P00A.jpg (72.29 KB)


  VCT.jpg (137.84 KB)

I currently don't have an ECU for the vehicle. I need ECU and AFM to get it running. I might see if there are any part numbers on the wiring loom and see what engine i have. I would Assume it would be a manual however in the wonderful world of automotive it could be anything.

Do you have the factory engine wiring harness? Does it have an ECU connector 64-pin or 84-pin?

S14 jdm SR20DE use MAF sensor instead of an AFM
* 22680-52F00 MASS AIR FLOW -9505
* 22680-52F01 MASS AIR FLOW 9505-

same as
* S13.SR20DE+DET 9101-
* RS13.SR20DET
* S15.SR20DE

But that's only for the factory ECU. If you go with Haltech, MegaSquirt, etc you can use AFM or MAP/TPS instead

Yes still have the factory loom.

As much as I would love to, I am refraining from splurging and buying an aftermarket ecu as I know how cheap factory ones can be.

Will check the loom plug next time I am in the workshop.

Thanks for all the help.